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  1. #include <stdio.h>
  2. #define MAX 3
  3.  
  4. struct stu
  5. { int ID;
  6. float kor, eng, math;
  7. float avg;
  8. char grade;};
  9.  
  10. int main(void) {
  11.  
  12. 	struct stu s[MAX];
  13. 	int i,j;
  14. 	float korsum=0, engsum=0, mathsum=0;
  15. 	printf("학번, 점수(국어, 영어, 수학)을 입력하세요.\n");
  16.  
  17. 	for (i=0;i<MAX;i++)
  18. 	{
  19. 		scanf("%d %f %f %f", &s[i].ID, &s[i].kor, &s[i].eng, &s[i].math);
  20. 	}
  21.  
  22. 	printf("\n입력된 점수\n");
  23. 	for(i=0;i<MAX;i++)
  24. 	{
  25. 		printf("%d %5.2f %5.2f %5.2f\n",s[i].ID,s[i].kor,s[i].eng, s[i].math);
  26. 	}  
  27. for (i=0;i<MAX;i++)
  28. {
  29. 	s[i].avg=(s[i].kor+s[i].eng+s[i].math)/3.0;
  30. 	korsum+=s[i].kor;
  31. 	engsum+=s[i].eng;
  32. 	mathsum+=s[i].math;
  33. }
  34. for (i=0;i<MAX;i++)
  35. { 
  36. 	if (s[i].avg>=90)
  37. 	s[i].grade='A';
  38. 	else if (s[i].avg>=80)
  39. 	s[i].grade='B';
  40. 	else if (s[i].avg>=70)
  41. 	s[i].grade='C';
  42. 	else if (s[i].avg>=60)
  43. 	s[i].grade='D';
  44. 	else 
  45. 	s[i].grade='F';
  46. }
  47. printf("\n**성적**\n");
  48. for (i=0;i<MAX;i++)
  49. printf("학번 : %5d\t평군: %5.2f\t학점 :%c\n", s[i].ID,s[i].avg, s[i].grade);
  50.  
  51. printf("\n**과목별 평균**\n");
  52. printf("국어:%5.2f 영어:%5.2f\n 수학:%5.2f",korsum/MAX, engsum/MAX, mathsum/MAX);
  53.  
  54. 	return 0;
  55. }
  56.  
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin
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1001 85 88 89
1002 77 85.3 52
1003 98 98 29
stdout
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학번, 점수(국어, 영어, 수학)을 입력하세요.

입력된 점수
1001 85.00 88.00 89.00
1002 77.00 85.30 52.00
1003 98.00 98.00 29.00

**성적**
학번 :  1001	평군: 87.33	학점 :B
학번 :  1002	평군: 71.43	학점 :C
학번 :  1003	평군: 75.00	학점 :C

**과목별 평균**
국어:86.67 영어:90.43
 수학:56.67
https://ideone.com/3hu2Be
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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